11.24: Two wave pulses travelzuxkpzuo40y3s9n( 8y1 smw +cjtlfy;f /2 a)t to the right toward a rigid boundary as shown. After reflection of the triap8/aj2)m( lfsusw+fo0 tct uy; 3 1zx4kynz 9yngular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and mi irzqi/(- z6h s fldds+(t21strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes fis(qs -itz+1h(mdf6i/lz2 d r or the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward throuv3(th 7/:s5mzf u3zb x+nqwmy gh the point labeled B in the diagram shown. The 33(wqb 7zhmsty :mz/x5u+vfn ray reaches a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenev ycd3s wp3(0rk yil+i-er light is incident on

  05.18: A student hold a hand ;cwuhk..8gen*r-rw a 4o )idp grj:.imirror to observe the back of her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of .kw. 4wcg r:eorgrid* p8-j i.han)u;her head how far behind the wall mirror?

  14.25: It is observed that6fki2;( fxag v a light ray changes direction when it enters a new material. Which one of the following choices is the term best associated with tx 6ifv fk(g2;ahis phenomenon?

  96.19: Light that has wavelength of 9t oxglmsh961a a2, sz1zbr- o500 nm in air has wavelength 400 nm in a transparent material. What is the indexszx,29 m6tb1so ao1-gh9alz r of refraction of the material?

  98.04: As sound travels fri+cnp ov8dm( 2lg)k:dom steel into air, both its speed and its:

  00.01: As a wave moves from one medium to aex(crsl:os86vo0 49 3 gwrlfk second medium with a different index of refraction whi6:r8( sslcr 4kx3wf l oeo90gvch of the following wave properties would NEVER change?

  05.47: A sound wave geney8,+ ucmkwgmky(qp,) 7vsdf,rated from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rocduyv8 ,,mg+ ,ms f)wp7y(kqkck?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emi;:g,e/wxqdhrsxzj83 rnl ) c9ts a sound wave that travels toward t;xl8cxj3 dq er shw9z,nr:/g)he surface of the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a rectangulaic hq9 y+* kddcz6(v9hr glass block with an angle of incidk y9hqdhd(c+vic*9z 6ence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on a boundary p p8/wtct2+zg as shown to the right. Which segment best represents the refracted wtgc+tp 8 2pz/ray?

  98.17: Which diagram best represents what happejv+w1kktpv(ask+ k: mor0e9;ns to a ray of light entering air from water? Air is +: tvjaoe1kk+w ksv9r(k0 mp;at the top in all diagrams.

  94.11: The critical angle of a material is the a 0fx tppx0+p++kao (ukngle of incidence for which the angle of r p uk0o+xxtk +(+fap0pefraction is:

  95.12: The principle underlying fiber optic.4 m;m.qip;,vrw lrtd s is:

  98.36: The critical angle in a transparent substance sur.l/ 4,1oefegi0c5rzf dno8ln rounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an index of refraction of y 4s/,bf ;p ,52vpn3o xqpstswn = 1.5 to material Y with an ind s 2qb/,f,wss;n35x 4yv ptpopex of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamp80 tj)t,/nbh 6ea e:pmlno:dond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.e8t6 0jmt e ,bno)danhp/l:p:52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a clear material. When the light makes t*i,ee ;t6xa(lwv ;daan angle of id6( vae*;;,e wxt tlaincidence equal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded 3kumzlhz)qil a 732)g in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parame lmzkluqg)32z37hi)a ters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1.k.ylbut cjh mb4/2j 4 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refrac l2/4c4 . jbhtjubm.yktion (n1, n2, and n3)?

  00.14: A beam of light passesftze n16+w5hpr-o ;nc from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about trz1n e56h+-;fo cnwpthe three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray:r +vgvp/pmaf43jxzunu6y4+ takes passing through three transparent materials. The indices of refraction in materials 1, 2, andv6j:u/nfzpp3ay gx++4m r v u4 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram belowc (gpkks+1oy ( shows the path taken by a monochromatic light ray traveling through three media.The symbolsp ky+sc(g o1(k $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light travosikf:,6cl;0avhy fe )7n 8zseling in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangular block of glas r 7)ag3e0hgpiixuua(f3 9p;ws at an an 3p aaf9(gw73rixhguep)i0u ;gle of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmittz/7ag o7 ekg 362rlgjted from air into a piece of glass. Which one of the labeled arrows best indicatel3r t oz26egag7/kg7js the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-trivok2, stltj5h9(bzw/ angular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shoh ,j5kt/o9b t( 2szvlwws the path of the light after it exits the glass?